<template>
  <a-calendar style="background-color: white">
    <ul slot="dateCellRender" slot-scope="value" class="events">
      <li v-for="item in getListData(value)" :key="item.content">
        <a-badge :status="item.type" :text="item.content" />
      </li>
    </ul>
    <template slot="monthCellRender" slot-scope="value">
      <div v-if="getMonthData(value)" class="notes-month">
        <section>{{ getMonthData(value) }}</section>
        <span>Backlog number</span>
      </div>
    </template>
  </a-calendar>
</template>
<script>
  export default {
    methods: {
      getListData (value) {
        let listData
        switch (value.date()) {
          case 8:
            listData = [
              { type: 'warning', content: 'This is warning event.' },
              { type: 'success', content: 'This is usual event.' }
            ]
            break
          case 10:
            listData = [
              { type: 'warning', content: 'This is warning event.' },
              { type: 'success', content: 'This is usual event.' },
              { type: 'error', content: 'This is error event.' }
            ]
            break
          case 15:
            listData = [
              { type: 'warning', content: 'This is warning event' },
              { type: 'success', content: 'This is very long usual event。。....' },
              { type: 'error', content: 'This is error event 1.' },
              { type: 'error', content: 'This is error event 2.' },
              { type: 'error', content: 'This is error event 3.' },
              { type: 'error', content: 'This is error event 4.' }
            ]
            break
          default:
        }
        return listData || []
      },

      getMonthData (value) {
        if (value.month() === 8) {
          return 1394
        }
      }
    }
  }
</script>
<style scoped>
  .events {
    list-style: none;
    margin: 0;
    padding: 0;
  }
  .events .ant-badge-status {
    overflow: hidden;
    white-space: nowrap;
    width: 100%;
    text-overflow: ellipsis;
    font-size: 12px;
  }
  .notes-month {
    text-align: center;
    font-size: 28px;
  }
  .notes-month section {
    font-size: 28px;
  }
</style>
